Cellulose composition.



GUSTAV KflLLER, OF FOREST GATE, ENGLAND.

GELLULOSE COMPOSITION.

1,079,773. No Drawing.

I Specification of Letterslatent.

Patented Nov. 25, 1.913.

. neaaonmearebma ys 912. Seri l. no- $676,861,.

To all whomit may concern:

land, have invented new and useful Improvements in Cellulose Compositions, of-

vvhich the following is a specification.

Of the 'chlorin substitution products of ethane and ethylene (tietrachlorethane also known as acetylene tetrachlorid and having the formula (3 1-1 01,, pentachlorethane (3 1101 dichlorethylene C H Gl trichlor- I ethylene O HCI and perchlorethylene (1,61,)

only tetrachlorethane, pentachlorethane and dichlorethylene have been tried or suggested for the purpose of dissolving or manufacturing cellulose compositions '(the latter two in conjunction with alcohol) dichlorethylene is the dearest, and, owing to its very low boiling point (55 0.), presents great difficulties .to. a thorough recovery of the solvent. It also burns.

Tetrachlorethane and 'pentachlorethane have a very high boiling point (147 C. and 159 C. respectively.) They are however, absolutely non-inflammable, but a very serious drawback has been discovered in the fact that bothshow a pronounced corrosive action on metals. Delicate machinery,'such as is used in the manufacture of films and artificial silk, deteriorates" considerably in contact with them.

Trichlorethylene and erchlorethylene are not only non-inflamma le, butalso indi-fferent to metals, that is, non-corrosive. these two, trichlorethylene possesses the advantages of low price-and a boiling point of 88 G. which insures, a speedy evaporation of the solvent and at the same time a thorough recovery of same, without any such losses as 'are unavoidably incurred when dichlorethylene is used. In spite of these favorable features it has not been possible hitherto to utilize t-richlorethylene and perchlorethylene in the manufacture of cellulose compositions, because they neither by themselves nor in conjunction with alcohol or camphoryield solutions of acetylized eel-- lulose.

Camphor substitutes such as mono and.

v p that way, which would possess a degree of Be it known that I, Gosmv KoLLER, a; subject 'of the Emperor of Austria-Hun-i gary, residing at Forest Gate, Essex, Eng-j flexibility and toughness equal to that of celluloid.

Various methods of incorporation of such phenols into known cellulose compositions, or of interaction between such cellulose compositions and phenols have been sug gested from time to time. None of these processes have led to products of all-around commercial utility. It appears (see British PatentNo-8945 of 1909, lines 15 to 27) that, although most of the additions suggested will impart at the beginning some flexibili-ty, all the products thus-obtained are of "er-y limited industrial applicability, owing to the fact that they are liable to change has been allowed .to evaporate.

have found that newand valuable cellulose compositions result from the interaction ofacetylized cellulose derivatives-orcomp sitions Containing such acetylized derive-- -color or to become brittle when the solvent tives or mixtures of .cellulose acetates with other cellulose esters or their solutions with chlorethylene and or perchlgrethylene. The new compositions are obtained either 1n the mono or poly-hydric phenols and with tri'-' form of solutions, or as gelatinous and plastic products.

f' By allowing the solvents to evaporate,

materials. are obtained which are transparent and possess a high degree of toughness and hardness, and which are superlor, as far' as flexibility is concerned, to the pressed or shaped cellulose compositions.

They can also be used as a flexible cement,

v and as an insulating or luting material which will resist the action of strong chemicals and of corrosive gases.

Example A: 2 parts of carbolic acid are dissolved in 20 parts of trichlorethylene, and 1 part of .an acetylized derivative of cellulose is added to the solution. Agitation and Of known cellulose acetate products. They are heating may be resorted to. Clear liquid be precipitated .way described.

Example B: 1 part of an acetylized derivative of cellulose is mixed orground with 2 parts of carbolic acid and then treated with 20 parts of perchlorethylene, when a new gelatinous product results, forming a separate layer on top of the bulk of the perchlorethylene phenol solution from which it can be separated without difficulty. When the separated mass is freed from any excess of liquid absorbed by it, a semi-solid and plastic material remains, which can be pressed and shaped as desired, and which -w1ll,-after the evaporation of the solvent, yield flexible products of a celluloid-like nature.

I' do not confine myself to the particulars given 1n the above examples which are perchlorethylene to solutions obtained in the merely typical, and can be varied within wide limits, without altering thereby the nature of this invention. A mixture for instance of the two chlorin. substitution products'of ethylene containing more than two atoms of chlorin such as trichlorethylene and perchlorethylene can be used and the proportions of the raw materials can be varied. By doing so it is possible to obtain, as desired, more liquid, or rigid'solutions.

What I claimis: v

1. The process of treating cellulose esters in the presence of phenols with chlorin substitution products of ethylene containing more than two atoms of chlorin subst'antiallyas describe 2. As a new article of manufacture an acetylized cellulose composition containing chlorin substitution having more than two atoms of chlorin and phenols substantially as described:

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GUSTAV KOLLER. Witnesses O. J. Vorrrn, C. P. LmnoN.

products of ethylene 

